Radio apparatus



Nov. 16 1926. A mamas V. A. R. FERNANDEE RADIO APPARATUS Filed June 8, 1925 3 Sheets-Shani 1 37 34 la 7 3g. 26 33 INVENTOR Nam 16 1926.

' v. A. R. FERNANDES RADIO APPARATUS I Filed June 8,

1925 3 sheets-$118 1; 2

ATTORNEY lTNESS:

Nov. 16 1926. 1,606,929

V. -A. R. FERNANDES RADI O APPARATUS Filed June 8 1925 3 Sheets-Sheat INVENTOR ATTORNEY TNES'S:

Patented Nov. 1926.

snares STATES VIRGILIO A. B. FEEHANDES, OF CABEDGE, MASSACHUSETTS.

,nanro Arrana'rus.

.Appllcation filed June's, 1925, Serial No. 35,781.

This invention relates to radio apparatus and more particularly to a mechanlsm for tuning the instruments of the same.

The principal object of the invention'resides in an apparatusjo'r' use in connection with radio receiving 's'ets which rmits the various instruments to be operatedtimultaneously at dillerant ratesof speed by themanipulat-ion of one of the instruments, whereby the set will be made more selective when. tuning in signals of various wave lengths, thus assuring a clear reception in the tone' the rotatable plates at varying degrees 0 or the signals.

Another object is to provide a single con-' 1 trol for a multiplicity of tuning instruments used in radio receiving sets, but which permits each instrument to be independently operated with respect to the other instruments when desired. I

with these and other objects in v h invention resides injcertain novel construction and combination .and arrangement of arts, the essential features of which are ereinaiter fully described, are particularly pointed out in the appended claims, and are illustrated in, the accompanying drawing, in which Z- Figure lie 0. front elevation of. a portion of the panel board of a radio receiving set.

m Figure 2 is a top plan view of the same.

Figure 3 is a 1011 itudinal sectional view on the line 33 of lgure 2.

Figure 4 is a transverse sectional view onthe line 4-4= of Figure 3. a

re 5 is a similar view on the line 5--5 of Figure 3.

Figure 6 is a similar view on the line 6-6' ,of Figure 3'."

Figure is a detail perspective viewiof one (if the actuating levers.

Fi ures 8 and 9 are detail views showing the illerent positions of the cams.

Refer-ring'more particularly to the drawings, the reference numeral 10 designates the panel board of a radio receiving set which is usually constructed of insulating material such as bakelite, and which sup-. ports a plurality of radio lnstruments such as condensers A, B and C, each of which in- W cludes a set of stationary plates S and a set of rotatable plates R, mounted upon shafts 11, 12 and 13 respectively, which are in turn 'ournalled in the panel board 10 'and' a racket 10 which extends the length of the struments which include a shaft to be r0 tated. It is, of course, understood that the rotatable plates R of respective disks are adapted to be rotated, one'with respect to the other in order to clearly tune in the radio signals. It is therefore my invention to provide a means for simultaneously operatin rotation in order to expedite the tuning operatlon, and to assure a finer adjustment of the instruments. Broadly, my invention includes a means -14: for transmitting motion from the instrumentA to the instrument B, and a similar means 15 for transmitting motion from the instrument B to the instrument C. Although I have shown only three -instrurmants, it will be readily, appreciated that any number of instruments may be operated in a similar manner.

Controlling means 17 and 18 are respectively provided for regulating the'transmitting means 14 and 15. The transmitting means 14; and 15 being identical in construction it is bel'eved that a description of one will sulfide-for the other'.' Each means .comprises a lever 19 ;having an enlar ed head 20 formed with aslot 21 therein. he shaft 11 passes throu h the slot 21 and has a wheel 22 keyed thereon which carries a pair of diametrically opposed pins .23 for co-acting engagement with the straight side wall 24 of the slot 21. The opposite side wall of the slot 21 is rounded or curved as at. 25 for a purpose to be presently explained. When the lever is in an operative position, the same is moved twice in one direction on each revolution of'the shaft lljb reason of the pins 21 engaging the straig 1t side wall 2 1 of the slot. The free end of .the lever is provided with an angularly disposed finger 26 which overlies a gear 27 keyed to the next adjacent shaft 12 of the-instrument B for co-action therewith. An'elongat'ed slot 27 is formed in thelever adjacent -.the f ree end thereof and through which an angularly disposed arm 28and a pivoted lever 29 extends.

;Arn arm -30 extends from the lever 19 intermediate its ends, and has one end of a contractile spring 31 connected thereto, the

suffice for the other.

other end of the spring being stationarily se cured to the panel or to the bracket 10'. This spring tends to pull the lever in a direction so that the straight wall 24 of the slot 21 will bepositioned in the path. of movement of the pins 23, but the lever is limitedin its'movement by the arm 28 abutting the end of the slot 27'. The controlling means 17 and 18 above referred to are also identical in construc action with graduations of an indicating .scale inscribed on the outside of the panel -boardfor visually indicating the different positions of the cams about to be described. A cam 34= is keyed to the shaft 32 and 00-, acts with the depending arm 30 for controlling and limiting-the backward movement of the lever 19 against the tension of the spring 31, and when the-highest point of the cam is movedinto engagement with thearm, the lever willhave been moved to a position-where the pins 23 will not touch the flat end wall 24as the shaft 11 is rotated. The spring 31 tends to-retract the lever and by reason of the shapeof the cam, it is pos-- sible to vary the degree of movement )f the lever in one direction. A second cam or fingcr 35 .is also mounted on the shaft 32 in the path of the tail of the pivoted lever 29, and when contacted by the cam, the lever raises the free end of the finger 26'of the lever 19 out of contact with the gear 27 to various horizontal planes. Itwill therefore be seen that by varying-the-horizontal planes of the finger. 26, andcontrollin the limit of move ment of the lever '19, t e gear -.27 may be moved at varying speeds with respect to the wheel 22, which 1n turn ca see the shafts 11 and 12 of the respective'in truments to likewise rotate. I 1

The same construction exists in the transmitting means 15 and-in the control means 18, butit will be seen thatwhen the shaft 11 is continually rotated, the speed of the same will be greater than that of the shaft l2- as an intermittent movement 'is imparted thereto, and the shaft 12 will rotate at a greater speed than the shaft 13. The ratio between the shafts may vary, forinstance. the shaft 12 may complete one'revolution to twenty revolutions of the shaft 11, while the shaft .13 may turn one revolution to-twenty revolutions of the shaft 12. This ratio is capable'of being varied by the operation of the control means: 17 and'18 as hereinbefore mentioned. Y I From the-foregoing description, it will be seen that the respective instrumepts may. be

operated simultaneously by the operation of the manipulating knob 36 keyed to the shaft 11, or the transmitting means 14 may be rendered inoperative by the manipulation of the control means 17 so that rotation of the manipulating knob of the shaft 12 will only cause the instruments B and C to be adjusted. If desired, each of the instruments may be independently operated by the operation of the means 17 and 18 which throws the respective-levers 19 out of coacting engagement with the respective gears. By providing a device of this nature in a radio receiving set, it is possible to more accurately tune in the signals, thereby producing a. clearer reception.

To prevent retrograde movement of the wheels 27 upon the backward movements of the levers 19, I provide flat tension springs 37 which are secured to the panel or bracket and bear against the wheels. However, if the bearings. supporting the instrument shafts are tight, such springs are not necessary While I have described what I deem to be the most desirable embodiment of my invention, it'is obvious that many of the de: tails maybe varied without in any way departing fromthe spirit of my invention, and I therefore do not limit myself to the exact details of construction herein set forth nor to anything-less than the whole of my invention limited only by the appended claims; Y

What is'claimed'as new is:

' lr-Inco mbination with a plurality of radio instruments .each having a rotatable shaft, means .for selectively transmitting an intermittent motion to certain of said shafts upon the continuous-rotation ofone' of said shafts, each of said means including a wheel keyed toa respective shaft, a gear ke ed to the next adjacent shaft, a lever opera Is by saidrwheelat predetermined intervals during each revolution of the same, said lever coacting with said gear for moving the same in one direction,.means for automatically returning said lever after each movement by said wheel, and means for controlling the extent of movement of said lever.

2. Ian radio apparatus, the combination with a pair of rotatable shafts, awheel keyed.

to one of said shafts, a gear keyed to the other of said shafts, a lever having a portion for eo-action with said gear, co-acting means between said. lever and said wheel for imparting an intermittent movement to said lever in-one direction for engagement with for eo-action with said gear,

between said lever and s parting an intermittent c0acting means and wheel for 1mmovement to sand lever in one direction for engagement with sand gear on each revolutlon of sald first shafi, means for automatlcally moving sand lever in'an opposite direct ion, and means for renderingsaid lever inopemthfe to permit: said shafts to be manually operejized one resnect to the other.

' n testimony whereof K have efiized my signature.

VIRGILIO A. e. FERNANDES, 

